1. 02 9月, 2008 2 次提交
  2. 26 8月, 2008 23 次提交
  3. 25 8月, 2008 15 次提交
    • P
      sched_clock: fix cpu_clock() · 354879bb
      Peter Zijlstra 提交于
      This patch fixes 3 issues:
      
      a) it removes the dependency on jiffies, because jiffies are incremented
         by a single CPU, and the tick is not synchronized between CPUs. Therefore
         relying on it to calculate a window to clip whacky TSC values doesn't work
         as it can drift around.
      
         So instead use [GTOD, GTOD+TICK_NSEC) as the window.
      
      b) __update_sched_clock() did (roughly speaking):
      
         delta = sched_clock() - scd->tick_raw;
         clock += delta;
      
         Which gives exponential growth, instead of linear.
      
      c) allows the sched_clock_cpu() value to warp the u64 without breaking.
      
      the results are more reliable sched_clock() deltas:
      
                 before       after   sched_clock
      
      cpu_clock: 15750        51312   51488
      cpu_clock: 59719        51052   50947
      cpu_clock: 15879        51249   51061
      cpu_clock: 1            50933   51198
      cpu_clock: 1            50931   51039
      cpu_clock: 1            51093   50981
      cpu_clock: 1            51043   51040
      cpu_clock: 1            50959   50938
      cpu_clock: 1            50981   51011
      cpu_clock: 1            51364   51212
      cpu_clock: 1            51219   51273
      cpu_clock: 1            51389   51048
      cpu_clock: 1            51285   51611
      cpu_clock: 1            50964   51137
      cpu_clock: 1            50973   50968
      cpu_clock: 1            50967   50972
      cpu_clock: 1            58910   58485
      cpu_clock: 1            51082   51025
      cpu_clock: 1            50957   50958
      cpu_clock: 1            50958   50957
      cpu_clock: 1006128      51128   50971
      cpu_clock: 1            51107   51155
      cpu_clock: 1            51371   51081
      cpu_clock: 1            51104   51365
      cpu_clock: 1            51363   51309
      cpu_clock: 1            51107   51160
      cpu_clock: 1            51139   51100
      cpu_clock: 1            51216   51136
      cpu_clock: 1            51207   51215
      cpu_clock: 1            51087   51263
      cpu_clock: 1            51249   51177
      cpu_clock: 1            51519   51412
      cpu_clock: 1            51416   51255
      cpu_clock: 1            51591   51594
      cpu_clock: 1            50966   51374
      cpu_clock: 1            50966   50966
      cpu_clock: 1            51291   50948
      cpu_clock: 1            50973   50867
      cpu_clock: 1            50970   50970
      cpu_clock: 998306       50970   50971
      cpu_clock: 1            50971   50970
      cpu_clock: 1            50970   50970
      cpu_clock: 1            50971   50971
      cpu_clock: 1            50970   50970
      cpu_clock: 1            51351   50970
      cpu_clock: 1            50970   51352
      cpu_clock: 1            50971   50970
      cpu_clock: 1            50970   50970
      cpu_clock: 1            51321   50971
      cpu_clock: 1            50974   51324
      Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      354879bb
    • A
      x86: add X86_FEATURE_XMM4_2 definitions · 2a61812a
      Austin Zhang 提交于
      Added Intel processor SSE4.2 feature flag.
      
      No in-tree user at the moment, but makes the tree-merging life easier
      for the crypto tree.
      Signed-off-by: NAustin Zhang <austin.zhang@intel.com>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      2a61812a
    • A
      KVM: fix userspace ABI breakage · 1327138e
      Adrian Bunk 提交于
      The following part of commit 9ef621d3
      (KVM: Support mixed endian machines) changed on the size of a struct
      that is exported to userspace:
      
      include/linux/kvm.h:
      
      @@ -318,14 +318,14 @@ struct kvm_trace_rec {
       	__u32 vcpu_id;
       	union {
       		struct {
      -			__u32 cycle_lo, cycle_hi;
      +			__u64 cycle_u64;
       			__u32 extra_u32[KVM_TRC_EXTRA_MAX];
       		} cycle;
       		struct {
       			__u32 extra_u32[KVM_TRC_EXTRA_MAX];
       		} nocycle;
       	} u;
      -};
      +} __attribute__((packed));
      
      Packing a struct was the correct idea, but it packed the wrong struct.
      Signed-off-by: NAdrian Bunk <bunk@kernel.org>
      Signed-off-by: NAvi Kivity <avi@qumranet.com>
      1327138e
    • A
      KVM: MMU: Fix torn shadow pte · cd5998eb
      Avi Kivity 提交于
      The shadow code assigns a pte directly in one place, which is nonatomic on
      i386 can can cause random memory references.  Fix by using an atomic setter.
      Signed-off-by: NAvi Kivity <avi@qumranet.com>
      cd5998eb
    • E
      KVM: Use .fixup instead of .text.fixup on __kvm_handle_fault_on_reboot · 18b13e54
      Eduardo Habkost 提交于
      vmlinux.lds expects the fixup code to be on a section named .fixup. The
      .text.fixup section is not mentioned on vmlinux.lds, and is included on
      the resulting vmlinux (just after .text) only because of ld heuristics on
      placing orphan sections.
      
      However, placing .text.fixup outside .text breaks the definition of
      _etext, making it exclude the .text.fixup contents. That makes .text.fixup
      be ignored by the kernel initialization code that needs to know about
      section locations, such as the code setting page protection bits.
      Signed-off-by: NEduardo Habkost <ehabkost@redhat.com>
      Signed-off-by: NAvi Kivity <avi@qumranet.com>
      18b13e54
    • R
      lguest: update commentry · 1dc3e3bc
      Rusty Russell 提交于
      Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
      1dc3e3bc
    • R
      stop_machine: Remove deprecated stop_machine_run · bf200296
      Rusty Russell 提交于
      Everyone should be using stop_machine() now.  The staged API
      transition helped life in linux-next.
      Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
      bf200296
    • R
      stop_machine: wean Xen off stop_machine_run · 37a7c0f3
      Rusty Russell 提交于
      This is the last use of (the deprecated) stop_machine_run in the tree.
      Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
      Acked-by: NJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
      37a7c0f3
    • A
      virtio_balloon: fix towards_target when deflating balloon · 532a6086
      Anthony Liguori 提交于
      Both v and vb->num_pages are u32 and unsigned int respectively.  If v is less
      than vb->num_pages (and it is, when deflating the balloon), the result is a
      very large 32-bit number.  Since we're returning a s64, instead of getting the
      same negative number we desire, we get a very large positive number.
      
      This handles the case where v < vb->num_pages and ensures we get a small,
      negative, s64 as the result.
      
      Rusty: please push this for 2.6.27-rc4.  It's probably appropriate for the
      stable tree too as it will cause an unexpected OOM when ballooning.
      Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
      Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (simplified)
      532a6086
    • P
      x86: fix cpufreq + sched_clock() regression · 52a8968c
      Peter Zijlstra 提交于
      I noticed that my sched_clock() was slow on a number of machine, so I
      started looking at cpufreq.
      
      The below seems to fix the problem for me.
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      52a8968c
    • I
      Merge branch 'linus' into x86/urgent · f58899bb
      Ingo Molnar 提交于
      f58899bb
    • J
      ALSA: ASoC: Fix double free and memory leak in many codec drivers · 3051e41a
      Jean Delvare 提交于
      Many SoC audio codec drivers have improper freeing of memory in error
      paths.
      
      * codec is allocated in the platform device probe function, but is not
        freed there in case of error. Instead it is freed in the i2c device
        probe function's error path. However the success or failure of both
        functions is not linked, so this could result in a double free (if
        the platform device is successfully probed, the i2c device probing
        fails and then the platform driver is unregistered.)
      
      * codec->private_data is allocated in many platform device probe
        functions but not freed in their error paths.
      
      This patch hopefully solves all these problems.
      Signed-off-by: NJean Delvare <khali@linux-fr.org>
      Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
      Signed-off-by: NTakashi Iwai <tiwai@suse.de>
      3051e41a
    • Y
      x86: fix HPET regression in 2.6.26 versus 2.6.25, check hpet against BAR, v3 · a2bd7274
      Yinghai Lu 提交于
      David Witbrodt tracked down (and bisected) a hpet bootup hang on his
      system to the following problem: a BIOS bug made the hpet device
      visible as a generic PCI device. If e820 reserved entries happen to
      be registered first in the resource tree [which v2.6.26 started doing],
      then the PCI code will reallocate that device's BAR to some other
      address - breaking timer IRQs and hanging the system.
      
      ( Normally hpet devices are hidden by the BIOS from the OS's PCI
        discovery via chipset magic. Sometimes the hpet is not a PCI device
        at all. )
      
      Solve this fundamental fragility by making non-PCI platform drivers
      insert resources into the resource tree even if it overlaps the e820
      reserved entry, to keep the resource manager from updating the BAR.
      
      Also do these checks for the ioapic and mmconfig addresses, and emit
      a warning if this happens.
      Bisected-by: NDavid Witbrodt <dawitbro@sbcglobal.net>
      Signed-off-by: NYinghai Lu <yhlu.kernel@gmail.com>
      Tested-by: NDavid Witbrodt <dawitbro@sbcglobal.net>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      a2bd7274
    • T
      ALSA: CA0106 on MSI K8N Diamond PLUS Motherboard · c5d44423
      Travis Place 提交于
      Correct a previous patch for the ca0106 onboard the MSI K8N Diamond PLUS
      motherboard. Confirmed to have Line/Mic/Aux working for input, and sound
      output working as expected.
      Signed-off-by: NTravis Place <wishie@wishie.net>
      Signed-off-by: NTakashi Iwai <tiwai@suse.de>
      c5d44423
    • L
      x86: do not enable TSC notifier if we don't need it · 060700b5
      Linus Torvalds 提交于
      Impact: crash on non-TSC-equipped CPUs
      
      Don't enable the TSC notifier if we *either*:
      
      1. don't have a CPU, or
      2. have a CPU with constant TSC.
      
      In either of those cases, the notifier is either damaging (1) or useless(2).
      
      From: Linus Torvalds <torvalds@linux-foundation.org>
      Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
      060700b5